Biaxial Stretching Production Line

Biaxial Stretching Production Line

The market for oriented films is consolidating worldwide, as commodity film producers continue to focus on cost optimization.biaxial stretching production line At the same time, specialty film production is gaining in importance. This is due to an increasing number of customers who prefer specialty films for their enhanced properties and unique applications. In order to meet these needs, new developments in raw materials, stretching equipment and film processing are necessary.

The biaxial stretching production line consists of a five-layer co-extrusion unit, casting machine, longitudinal stretching machine (MDO) and transverse stretching machine (TDO), automatic rewinding unit, centralized control system and other components.biaxial stretching production line This process stretches the multilayer nonwoven laminates in both machine and cross-machine directions up to a production width of 5,200 millimeters, significantly enhancing their special characteristics.

As a result, the biaxially oriented PVC (PVCO) pipe has much better fracture resistance compared to un-plasticized PVC. This improvement is attributed to the orientation of the multiple layers within the PVC pipe wall, which are created by the biaxial stretching process.

Injection stretch blow molding machines produce superior clarity and surface finish compared to extrusion blow molding. These features set injection stretch blow molding apart from other plastic bottle production processes and make it the ideal choice for products such as water bottles and other clear packaging.

To achieve this, the PET melt that flows out of the die in a molten state is quenched quickly by the cold cast roller to solidify it at a temperature above its glass transition point and below its melting point. This step is essential to ensure the quality and strength of the final product.

After cooling, the thick sheet of polymer material is fed through a pair of nip rollers and stretched biaxially with a machine-diameter and cross-machine-width ratio. The biaxial stretching promotes the ordering of the polymer chains and crystals in the plane direction to provide the required mechanical strength.

The biaxially oriented PVC film has many unique properties that make it the material of choice for a wide range of applications. In addition to improved fracture resistance, this film offers high oxygen and moisture barrier properties, excellent chemical and aroma resistance and a good low-temperature performance.

The production of biaxially oriented PVC is accomplished using the tenter frame process, which utilizes a series of endless chains that grip and stretch the web of plastic film in both machine-diameter and cross-machine direction. Depending on the application, this can be done sequentially or simultaneously with longitudinal and transverse stretching. The simultaneous method is commonly used in the manufacture of UV protective film, solar panel, heat sealing film and explosion-proof film. It is also suitable for producing PVC-O pipes for industrial and optical applications. The tubes can be produced with either a smooth or corona-treated surface. The coating improves the mechanical and barrier properties of the PVC, thereby improving its appearance. In addition, it increases its ductility and tensile strength. This is an important benefit for the industry because it makes the pipes more resistant to cracking and discoloration.